plz see the attachment

Remaining Time: 278:41:27 The goal of this exercise is to approximate the value of the definite integral 1 /2 (x2 - 1)da using a Riemann sum with left endpoints and 6 subintervals (i.e. using the Riemann sum L6)- a) If you sub-divide the interval [5, 8] into 6 subintervals of equal length A:x, you get 6 subintervals of the form (, 1, I;] whose union is the interval (5, 8). Find the endpoints :0, T1,..., 6 that define these 6 subintervals, FORMATTING: To enter your answer, list the endpoints in the form (x . x], . .., 2 6 including the square brackets [ ] and a comma (,) between endpoints. The endpoints should be exact numbers, ordered from left to right. Answer: (50, $1,..,6] = b) Compute the exact value of each term t; = f(x;_] ) Ax of the Riemann sum In FORMATTING: To enter your answer, list the terms in the form [t , to, . . .. tel including the square brackets [ ] and a comma (,) between consecutive terms. Each term must be an exact number. Answer: [1: t2. . ..,to] = c) Compute the value of the Riemann sum L. Write your answer with an accuracy of two decimal places. Answer: Number